<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
</body>
</html>
<script>
    function computed(str){
        var arr = str.split('')
        arr.splice(14,1,'啊')
        arr.splice(0,1,'H')
        arr.splice(6,1,'W')
        arr.splice(5,1) 
        arr.splice(9,1) 
        arr.reverse()
        var NewArray = arr.join('')

       console.log(arr);
       console.log(NewArray);
       
    }
    computed('hello word 我爱你!')
</script>